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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) IPADS@SJTU 2023. All rights reserved.
*/
#ifndef __SBI_DOMAIN_CONTEXT_H__
#define __SBI_DOMAIN_CONTEXT_H__
#include <sbi/sbi_types.h>
#include <sbi/sbi_trap.h>
#include <sbi/sbi_domain.h>
/** Context representation for a hart within a domain */
struct sbi_context {
/** Trap-related states such as GPRs, mepc, and mstatus */
struct sbi_trap_context trap_ctx;
/** Supervisor status register */
unsigned long sstatus;
/** Supervisor interrupt enable register */
unsigned long sie;
/** Supervisor trap vector base address register */
unsigned long stvec;
/** Supervisor scratch register for temporary storage */
unsigned long sscratch;
/** Supervisor exception program counter register */
unsigned long sepc;
/** Supervisor cause register */
unsigned long scause;
/** Supervisor trap value register */
unsigned long stval;
/** Supervisor interrupt pending register */
unsigned long sip;
/** Supervisor address translation and protection register */
unsigned long satp;
/** Counter-enable register */
unsigned long scounteren;
/** Supervisor environment configuration register */
unsigned long senvcfg;
/** Reference to the owning domain */
struct sbi_domain *dom;
/** Previous context (caller) to jump to during context exits */
struct sbi_context *prev_ctx;
/** Is context initialized and runnable */
bool initialized;
};
/** Get the context pointer for a given hart index and domain */
#define sbi_hartindex_to_domain_context(__hartindex, __d) \
(__d)->hartindex_to_context_table[__hartindex]
/** Macro to obtain the current hart's context pointer */
#define sbi_domain_context_thishart_ptr() \
sbi_hartindex_to_domain_context( \
sbi_hartid_to_hartindex(current_hartid()), \
sbi_domain_thishart_ptr())
/**
* Enter a specific domain context synchronously
* @param dom pointer to domain
*
* @return 0 on success and negative error code on failure
*/
int sbi_domain_context_enter(struct sbi_domain *dom);
/**
* Exit the current domain context, and then return to the caller
* of sbi_domain_context_enter or attempt to start the next domain
* context to be initialized
*
* @return 0 on success and negative error code on failure
*/
int sbi_domain_context_exit(void);
#endif // __SBI_DOMAIN_CONTEXT_H__
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